Firearm



Oct. 14 1924. 1,511,510"

L. N. DIEHM FIREARM Filed Aug. 6, 1921 2 Sheets-Sheet l 0 M; a fmw Oct. 14 1924. 1,511,510

L.bL DIEPHW FIREARM Filed Aug. 6. 1921- 2 SneezS SheS: 2

.TUPNEY Patented Oct. 14, 1924.

SES

PATENT OFFICE.

LUCIUS 1\T. DIEHM, F VIEST HARTFORD, CONNECTICUT, ASSIGNOR 0F ONE-HALF TO BERKLEY C. STONE, OF MIDDLETOWN, CONNECTICUT.

FIREARM.

Application filed. August 6, 1921.

To all whom it may concern:

Be it known that I, LUOIUS N. DIEHM, a citizen of the United States, residing in West Hartford, in the county of Hartford and State of Connecticut, have invented new and Improved Firearms, of Which the following is a specification.

My invention relates to that class of firearms that are usually supported on the person while being fired, and an object of my invention, among others, is to provide a firearm of this type that shall be simple in construction and particularly eflicient in operation.

One form of gun embodying my invention and in the construction and use of which the objects herein set'out, as well as others, may be attained, is illustrated in the accompanying drawings, in which Figure 1 is a view in side elevation of my improved firearm, the barrel being shown as broken'ofi as to its outer end, the handle and side grips being removed, the breech-bolt being closed, and parts being broken away to show construction.

Figure 2 is a similar view but showing the breech-bolt open.

Figure 3 is a view in side elevation with parts brokeniaway to show construction, the breech-bolt being closed.

Figure 4 is a top view with the barrel broken off and with parts cut in section on a plane denoted by the dotted line 4-4 of Figure 3.

Figure 5 is a view in side elevation of a portion ofthe device, with the breech-bolt closed.

Figure 6 is a view in vertical section on 1 plane denoted by the dotted line 66 of Figure 5.

In the accompanying drawings my improved firearm is shown without the handle grips, that is, the metallic part of the structure only is illustrated, and this includes a frame comprising a handle 10, that may be supplied in the ordinary manner with such grips, and a receiver 11 formed integral with and located at the upper part of the handle, a barrel 12 being secured to the forward part of the receiver in any suitable manner. The handle has the usual magazine chamber 13 to receive a magazine in the usual manher and as will be readily understood by those skilled in the art.

The receiver is cut away at its top and Serial No. 490,224.

rear part to provide a rectangularly shaped breech-bolt notch 14 within which a breech-bolt 15 is mounted for reciprocating movement, said bolt being secured for such movement as by means of interengaging lips 16 and grooves 17 on the inner face of the side parts of the breech-bolt and the outer sides of the receiver in an ordinary manner.

A spring chamber 18 extends lengthwise from the rear end of the breech-bolt inwardly, a hole 19 extending from said chamber to the front end of the bolt. A spring support 20 extends through the chamber 18 and hole 19, the inner end of the support being secured in the receiver forward of the breech-bolt. A head 21 on this support receives the thrust of a breech-bolt spring 22 at one end thereof, the opposite end of said spring being seated against the bottom of the chamber 18. This spring acts to force the breech-bolt forwardly to its closed position after it has been forced backwardly by the forces generated by the explosion of a cartridge, my improved piston being of that type in which the extraction of a shell and the insertion of a cartridge is automatically wall of the notch 14, a retainer 23 engaging a notch in the support to secure it in place. This retainer is in the form of a screw threaded into a hole in the side of the receiver and having a finger-piece 24 by means of which the retainer may be removed. In order to secure the support 20 in place in the breech-bolt, when released by the retainer, and prevent its being forced out of the breech-bolt by the spring '22, thus permitting the breech-bolt to be removed with the spring secured therein, a holder 25, in the form of a bushing is secured to the spring support as by means of a pin, as shown in dotted lines in Figure 4 of the drawings, said pin projecting through the bushing and through a notch in the .side of the support 20. A firing pin 26 and an extractor 27, both of ordinary construction, may be employed for firing and extracting purposes, the extractor spring being shown in dotted lines in Figure 4.

A groove 28 is formed in the bottom of the breechbolt to provide the side parts thereof, and a hammer recess 29 opens out of said groove, thev forward end of the recess comprising a stop shoulder to engage a stop 80 seated on a spring in a stop recess 31 opening downwardly from the top of the receiver and within the notch 14, the bottom of said recess being closed, that is, it does not extend through to the outer surface of the receiver or handle and said surface is, therefore, smooth. The stop 30 is held against displacement as by means of a pin extending through the side of the receiver into the recess 31 and engaging a shoulder on said stop. The groove 28 does not e1:- te'nd out at the back of the breech-bolt and the latter is, therefore, flush and smooth with the back end of the receiver.

A hammer 32 is pivotally mounted in a hammer chamber 33 opening downwardly from the top of the receiver and conse quently through the bottom of the notch 14, said chamber also opening rearwardly from the mazazine chamber, a hammer strut 34 seated ona spring in a well in the handle 10 and of any ordinary construction being employed to force the hammer forward against a firing pin for firing purposes.

lipsear is pivotally mounted in proximity 'to the hammer, thissear comprising a body 35-of a Width substantially the width of the hammer and. with a scar tail 86 extending ("lownw ardly into a sear tail recess 37 opening from the back of the magazine chamber, a sear spring 38 being-located in said recess and thrusting against the sear tail. A sear actuating lug 39 projects from one edge of thesear body in position to be engaged by a trigger bar 40 having a sear actuating hook 41 to engage said lug, said bar having a stop shoulder 42 to engage a trigger bar lock 43 projecting from a locking lever 44 pivotally' attachedto the'side'of the receiver and having an actuating thumb piece 45 and a "re'ec'h-bdlt lock 46, this lock being in the "fees of a nose on the lever projecting into a breech boltlocking recess '47 formed in the edge of one of the side parts of the breechbolt. hen the lever '44 is in its locking position to lock the trigger b'ar against movement to operate the sear, it also prevent'sopening movement of the breech-bolt. This lever also has a breech-bolt lock 48 at its "end opposite the lock 46 to engage a breech-bolt locking recess 49 formed in the edge in one of the side parts of the breechbolt, as shown in Figure 5 of the drawings.

The trigger bar 40 is held normally in a raised position by neans of a spring actuated plunger 50 located in a socket in the under side of the trigger bar, the end of said bar being pivotally connected with the upper end of a trigger 51 pivotally mounted in the receiver and having a spring actuated trigger plunger 52 located in a well 53 projecting diagonally downward from the front wall of the trigger opening in the receiver, this construction enabling said Well to be bored through the opening for the magazine in the floor of the notch 14 and the plunger 52 to be inserted through said opening.

A disconnector 54 is pivotally mounted in a disconnector slot 55 formed in the receiver between the bot-tom of the slot for the lip 16 and the recess 56 for the trigger bar, the free end of the disconnector engaging within the recess 47, which recess serves the double purpose of locking the breech-bolt and of actuating the disconnector to operate the trigger bar. A disconnector actuating lug 5'? projects from the bottom edge of the disconnector into engagement with the trigger bar 40 to actuate the latter and disconnect it from the lug 39 to prevent unintentional firing of the device, as by reason of continued pressure upon the trigger immediately following discharge. It will also be noted that the plunger 50 serves the double purpose of forcing the trigger bar into engagement with its actuating lug 39 and also of forcing the disconnector into engagement with the breech-bolt.

I claim 1. A. firearm including a frame, a breechbolt movably mounted therein and having a locking recess, means on the frame toengage said recess to hold the breech bolt against movement, a disconnector pivotally mounted on the frame to engage said recess to be operated thereby, a trigger bar operatively connected with said disco1inector,and other parts to complete the mechanism of said firearm. I

2. A firearm including a frame with firing mechanism mounted thereon and including a scar, a lug projecting from said sear, a trigger bar having a hook on one side to engage said lug and a stop shoulder on the opposite side, and a safety lever having a lug to engage said step shoulder and prevent operation of the trigger bar.

3. A firearm including'a frameya breechbolt movably mounted thereon and having a spring chamber, a spring support located in said chamber and projecting from one end of the breech-bolt, a spring located within said chamber and thrusting against a fixed part of said support, means for preventing movement of said support in the breech-bolt under force of said spring, and means for securing said support to the frame.

4. A firearm including a frame, a breechbolt movably mounted thereon and having a spring chamber, a spring support located in said chamber and projecting from the end of the breech-bolt and having a head located in said chamber, a spring located in said chamber and thrusting against said head, means secured to the support outside of the breech-bolt to hold said support against the tension of said spring, and means for securing said support to the frame.

5. A firearm including a frame, a breechbolt movably mounted on the frame and having a spring chamber, a spring support located in said chamber and projecting from one end of the breech-bolt, a spring located Within said chamber and thrusting against a fixed part of said support, means for securing the support to the breech-bolt to prevent movement of said support under tension of the spring, and means for removably securing the support to said frame.

6. A firearm including a frame, a breechbolt movably mounted on the frame and having a spring chamber, a spring support located in said chamber and projecting from one end of the breech-bolt, a spring located in said chamber and thrusting against a fixed part of said support, a bushing secured to said support outside of the breech-bolt and fitting a recess in the frame, said bushing holding the spring support against movement under force of its spring, and means for removably securing said support to the frame.

LUGIUS N. DIEHM. 

